Students arrive at the Administrative Services Office according to a Poisson distribution at a rate of 12 students per hour. Judy, the only clerk who works at the Office, works 6 hours per day. Students' requests take on average 3.75 minutes each to be processed. There have been complaints that the average wait time (in line) has been too long in the Office. Management is considering to hire a new temporary clerk (Mary) to work in parallel with Judy, working at the same rate as Judy's. Give management an estimate of the reduction in waiting time (in line) that would result from the addition of one clerk (Mary) to the office.